Interaction between the predator Xylocoris sordidus and Bacillus thuringiensis bioinsecticides

Interaction between the predator Xylocoris sordidus and Bacillus thuringiensis bioinsecticides

Xylocoris species (Hemiptera: Anthocoridae) are known to occur in various habitats and attack a diversity of agriculturally important prey. Other groups of organisms, such as strains of Bacillus thuringiensis Berliner (Bt) bacteria, also have been extensively studied and applied as biological contro...

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Bibliographic Details
Published in:Entomologia experimentalis et applicata Vol. 168; no. 5; pp. 371 - 380
Main Authors: Santos, Nathália A., Ramalho, Dagmara G., Marques, Hortência M., Godoy, Joana D.S., De Bortoli, Caroline P., Magalhães, Gustavo O., Vacari, Alessandra Marieli, De Bortoli, Sergio A.
Format: Journal Article
Language:English
Published: Amsterdam Wiley Subscription Services, Inc 01-05-2020
Subjects:
Agricultural practices
Anthocoridae
Bacillus thuringiensis
biocontrol agent
Biological control
consumption rate
diamondback moth
Eggs
functional response
Hemiptera
Integrated pest management
interference
IPM
Lepidoptera
Pest control
Pests
Plutella xylostella
Predators
predatory capacity
Prey
Xylocoris sordidus
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Summary:Xylocoris species (Hemiptera: Anthocoridae) are known to occur in various habitats and attack a diversity of agriculturally important prey. Other groups of organisms, such as strains of Bacillus thuringiensis Berliner (Bt) bacteria, also have been extensively studied and applied as biological control agents. The use of these Bt‐bioinsecticides in association with predators may be a good strategy in integrated pest management. This work had the objective to study predator behaviour, predatory capacity, and functional response of fifth‐instar nymphs of Xylocoris sordidus (Reuter) to eggs of Plutella xylostella (L.) (Lepidoptera: Plutellidae) and Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae) treated with one of three commercial Bt‐bioinsecticides. The predator presented a type II functional response to untreated P. xylostella eggs (control) and to eggs treated with Agree, whereas the response was type III to P. xylostella eggs treated with Xentari and Dipel. However, on a diet of C. cephalonica eggs the predator displayed a type II response curve on eggs treated with each of the three bioinsecticides, and a type III response on untreated eggs. Bioinsecticides based on B. thuringiensis may be used in association with X. sordidus predators to control lepidopterous pest species. We studied predator behaviour of Xylocoris sordidus (Hemiptera: Anthocoridae), evaluating predatory capacity and functional response on eggs of Plutella xylostella (Lepidoptera: Plutellidae) and Corcyra cephalonica (Lepidoptera: Pyralidae) treated with each of the three Bt‐bioinsecticides, Agree, Dipel, and Xentari. Bioinsecticides based on Bacillus thuringiensis may be used in association with X. sordidus predators, as the bioinsecticides do not impair their predation ability, and in some cases may even increase the consumption of prey by the predator.
ISSN:0013-8703
1570-7458
DOI:10.1111/eea.12896